ISDA

Entry Detail

PDB ID:

3B4A

Keywords:

RNA

Title:

T. tengcongensis glmS ribozyme with G40A mutation, bound to glucosamine-6-phosphate

Biological Source:

Source Organism:

Thermoanaerobacter tengcongensis

PDB Version:

Deposition Date:

2007-10-23

Release Date:

2007-12-11

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.70 Å

R-Value Free:

0.27

R-Value Work:

0.24

Space Group:

P 21 21 2

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Macromolecular Entities

Polymer Type:polyribonucleotide
Description:glmS ribozyme substrate RNA
Chain IDs:A
Chain Length:28
Number of Molecules:1
Biological Source:Thermoanaerobacter tengcongensis

Polymer Type:polyribonucleotide
Description:glmS ribozyme RNA
Mutations:G40A
Chain IDs:B
Chain Length:125
Number of Molecules:1
Biological Source:Thermoanaerobacter tengcongensis

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
A23	B	A	?

Ligand Molecules

GLP

Primary Citation

Essential Role of an Active-Site Guanine in glmS Ribozyme Catalysis.

Klein, D.J, Been, M.D, Ferre-D'Amare, A.R.Show

J.Am.Chem.Soc. 129 14858 14859 (2007)

PMID: 17990888 DOI: 10.1021/ja0768441

Abstact

The glmS ribozyme is a catalytic riboswitch that is activated for endonucleolytic cleavage by the coenzyme glucosamine-6-phosphate. Using kinetic assays and X-ray crystallography, we identify an active-site mutation of a conserved guanine that abolishes catalysis without perturbing coenzyme binding. Our results provide evidence that coenzyme function requires a specific nucleobase to interact with the nucleophile of the cleavage reaction.

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Protein

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Primary Citation of related structures